Abstract: The invention allows foot measurement for selecting ready-made footwear that provides accurate results efficiently, easily and with low costs, and which can be performed both at home and at stores. An apparatus (120) of foot measurement comprises a base plate (121) and a single circumference measurement loop (123). The base plate (121) is utilized in measuring the length (401) of a foot, and an elastic portion (123A) of the circumference measurement loop (123) is utilized in measuring the circumference (402) around the ball of the foot.